Custom Trapezoidal Envelope Seat Box Cushion Filled with Down/Feather with a Foam Core in the middle

Custom Trapezoidal Envelope Seat Box Cushion Down/Feather. Enter the Dimensions below and select the combination of Down/Feather for the Cushion. The seat cushion is channeled to prevent the down and feathers from moving, and the foam is enclosed in the middle in a zippered compartment . It is filled to provide a comfortable rear support and let the bottom sink a little into the cushion when a person sits on it. The foam core serves 2 purposes: 1) The foam gives the cushion added support that down and feather can not provide in a limited thickness. For example a 4" thick down and feather cushion (with no foam) will bottom out with when most heavy people sit on it. A foam core will help prevent the person from feeling the wood beneath the cushion. 2) The foam core spring back immediately and prevents the cushion from having a wrinkled look. This will help with the maintenance.Note: Enter the finish size of the cushion cover, we will add necessary amount for compression. Rememberdown & feather envelopes bulge upward (they are not flat, they have a "crown") so we will add a few inches to your size to allow for that. If you are having new covers made for your sofa make sure they add at least 1 to 2 inches for the crown. Unless you change the foam core we will use a 3115 foam which is a medium firmness, high density foam. Call us if you need info.Typically, for example a 5" thick (B) cushion with a 3" (C) foam will crown up to 8" in the center. We recommend using a foam 2" smaller than the total height of the side of the cushion. For example a 6" (B) cushion can use a 4" foam (C), and it will still crown up to about 9" top to bottom in the center. Call us if you need info.